(4aS,6aR,6bR,8aR,12aR,12bR,14bS)-6a-[(E)-3-(3,4-Bis-benzhydryloxy-phenyl)-acryloyloxymethyl]-2,2,6b,9,9,12a-hexamethyl-10-oxo-1,3,4,5,6,6a,6b,7,8,8a,9,10,11,12,12a,12b,13,14b-octadecahydro-2H-picene-4a-carboxylic acid | 186383-03-9

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 异戊烯醇脂质
• 英文名称: (4aS,6aR,6bR,8aR,12aR,12bR,14bS)-6a-[(E)-3-(3,4-Bis-benzhydryloxy-phenyl)-acryloyloxymethyl]-2,2,6b,9,9,12a-hexamethyl-10-oxo-1,3,4,5,6,6a,6b,7,8,8a,9,10,11,12,12a,12b,13,14b-octadecahydro-2H-picene-4a-carboxylic acid
• 英文别名: (4aS,6aR,6aR,6bR,8aR,12aR,14bS)-6a-[[(E)-3-(3,4-dibenzhydryloxyphenyl)prop-2-enoyl]oxymethyl]-2,2,6b,9,9,12a-hexamethyl-10-oxo-3,4,5,6,6a,7,8,8a,11,12,13,14b-dodecahydro-1H-picene-4a-carboxylic acid
• CAS: 186383-03-9
• 化学式: C₆₅H₇₂O₇
• 分子量: 965.282
• InChiKey: AMHQXAFCRZJBLH-IBFVPGKTSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  14.7
• 重原子数：
  72
• 可旋转键数：
  14
• 环数：
  10.0
• sp3杂化的碳原子比例：
  0.43
• 拓扑面积：
  99.1
• 氢给体数：
  1
• 氢受体数：
  7

反应信息

• 作为反应物：
  描述：

  (4aS,6aR,6bR,8aR,12aR,12bR,14bS)-6a-[(E)-3-(3,4-Bis-benzhydryloxy-phenyl)-acryloyloxymethyl]-2,2,6b,9,9,12a-hexamethyl-10-oxo-1,3,4,5,6,6a,6b,7,8,8a,9,10,11,12,12a,12b,13,14b-octadecahydro-2H-picene-4a-carboxylic acid 在 三氟乙酸 作用下， 以 various solvent(s) 为溶剂， 反应 1.5h， 生成 (4-碘-苯甲基)-膦酸二乙基酯
  参考文献：
  名称：

  Practical Partial Synthesis of Myriceric Acid A, an Endothelin Receptor Antagonist, from Oleanolic Acid

  摘要：

  Myriceric acid A (1) is an oleanane triterpene that is a potent and specific endothelin A receptor antagonist. A practical procedure for large-scale synthesis of myriceric acid A (1) has been developed starting from oleanolic acid 4. The conversion of oleanolic acid 4 to the key intermediate myricerone 3 was achieved in an efficient manner employing a photochemical reaction (the Barton reaction) of nitrite 7. Our synthetic procedure alleviated several difficulties of the original Barton's procedure with regard to yields and large-scale operation. Myricerone 3 afforded Horner-Wadsworth-Emmons (HWE) type phosphonate 2 which has proved to be a versatile precursor of 1. The preparation of phosphonate 2 on a scale of several hundred grams is described. The synthesis was completed by condensation of 2 with 3,4-bis[(diphenylmethyl)oxy]benzaldehyde (21), giving alpha,beta-unsaturated ester 22, which was deprotected to afford 1. The whole synthetic sequence is efficient (14 steps, 31% yield) and requires no chromatographic purification except to obtain the final product 1.

  DOI：

  10.1021/jo9615864
• 作为产物：
  描述：

  myricerone ketal 在 盐酸 、 1,8-二氮杂双环[5.4.0]十一碳-7-烯 、 N,N'-羰基二咪唑 、 lithium chloride 作用下， 以 四氢呋喃 、 二氯甲烷 、 N,N-二甲基甲酰胺 为溶剂， 反应 12.25h， 生成 (4aS,6aR,6bR,8aR,12aR,12bR,14bS)-6a-[(E)-3-(3,4-Bis-benzhydryloxy-phenyl)-acryloyloxymethyl]-2,2,6b,9,9,12a-hexamethyl-10-oxo-1,3,4,5,6,6a,6b,7,8,8a,9,10,11,12,12a,12b,13,14b-octadecahydro-2H-picene-4a-carboxylic acid
  参考文献：
  名称：

  Practical Partial Synthesis of Myriceric Acid A, an Endothelin Receptor Antagonist, from Oleanolic Acid

  摘要：

  Myriceric acid A (1) is an oleanane triterpene that is a potent and specific endothelin A receptor antagonist. A practical procedure for large-scale synthesis of myriceric acid A (1) has been developed starting from oleanolic acid 4. The conversion of oleanolic acid 4 to the key intermediate myricerone 3 was achieved in an efficient manner employing a photochemical reaction (the Barton reaction) of nitrite 7. Our synthetic procedure alleviated several difficulties of the original Barton's procedure with regard to yields and large-scale operation. Myricerone 3 afforded Horner-Wadsworth-Emmons (HWE) type phosphonate 2 which has proved to be a versatile precursor of 1. The preparation of phosphonate 2 on a scale of several hundred grams is described. The synthesis was completed by condensation of 2 with 3,4-bis[(diphenylmethyl)oxy]benzaldehyde (21), giving alpha,beta-unsaturated ester 22, which was deprotected to afford 1. The whole synthetic sequence is efficient (14 steps, 31% yield) and requires no chromatographic purification except to obtain the final product 1.

  DOI：

  10.1021/jo9615864